EP2663468B1 - Method for operating an onboard power supply system of a motor vehicle - Google Patents

Method for operating an onboard power supply system of a motor vehicle Download PDF

Info

Publication number
EP2663468B1
EP2663468B1 EP11801984.3A EP11801984A EP2663468B1 EP 2663468 B1 EP2663468 B1 EP 2663468B1 EP 11801984 A EP11801984 A EP 11801984A EP 2663468 B1 EP2663468 B1 EP 2663468B1
Authority
EP
European Patent Office
Prior art keywords
network
voltage
low
voltage network
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP11801984.3A
Other languages
German (de)
French (fr)
Other versions
EP2663468A2 (en
Inventor
Niklas Schalli
Holger Haecker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Audi AG
Original Assignee
Audi AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Audi AG filed Critical Audi AG
Publication of EP2663468A2 publication Critical patent/EP2663468A2/en
Application granted granted Critical
Publication of EP2663468B1 publication Critical patent/EP2663468B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B60L1/02—Supplying electric power to auxiliary equipment of vehicles to electric heating circuits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/20—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having different nominal voltages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/547—Voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/549—Current
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Definitions

  • the invention relates to a method for operating an on-board electrical system structure of a motor vehicle, the on-board electrical system structure having at least two electrical networks with different network voltages, a high-voltage network for supplying power to at least one low-voltage network with a lower network voltage than the high-voltage network delivering a certain amount of power to the at least one low-voltage network, wherein at least one network component, in particular an electrical consumer, is connected to each network and the high-voltage network has at least one high-voltage battery connected to it.
  • Motor vehicles in particular electric motor vehicles with an electrical drive, are known with an on-board network structure with two or more parallel electrical networks, the networks differing in their network voltages.
  • the high-voltage network supplies the or at least one low-voltage network with a certain amount of electrical power, in particular also during the charging process of the high-voltage battery of the high-voltage network, for operating the network components or electrical consumers connected to the low-voltage network, or the amount of power delivered to the low-voltage network on the high-voltage network side is also used to charge a low-voltage network side connected low-voltage battery.
  • the high-voltage battery of the high-voltage network can overheat during the charging process, for example, since a cooling device that cools the high-voltage battery during the charging process cannot be supplied with sufficient electrical power.
  • WO 2007/096720 A1 describes an electrically powered vehicle that includes a high-voltage battery for operating an electrical machine, a solar battery, a charging DC / DC converter that transmits electrical power generated by the solar battery to the high-voltage battery, and a low-voltage battery.
  • the low-voltage battery is connected to the high-voltage battery via a DC converter.
  • a third DC-DC converter is provided, which converts the voltage generated by the solar battery into the voltage of the low-voltage battery.
  • two relays are opened which connect the high-voltage battery to the direct-voltage converter supplying the low-voltage network in order to decouple the low-voltage network from the high-voltage battery.
  • a monitoring unit operated via the low-voltage network is switched off in order to prevent undesired discharging of the low-voltage battery of the low-voltage network in the parked state of the motor vehicle, in particular in the event of insufficient power provided by the solar battery.
  • DE 10 2005 002 401 A1 describes a motor vehicle electrical system with a 12 V battery and a further battery with a secondary voltage of 42 V.
  • the motor vehicle electrical system is divided into two subnetworks, one of which has a nominal voltage of 14 V and the other has a nominal voltage of 42 V.
  • Energy can be transported between the two sub-networks via an energy converter.
  • the available power which can be provided by the two batteries and, if appropriate, the energy converter, is distributed uniformly to various end users and, if appropriate, to the energy stores via a central computing unit, without that the vehicle electrical system is overloaded.
  • a priority is assigned to each of the consumers to be supplied as a function of an overall condition of the motor vehicle.
  • the invention is therefore based on the problem of specifying an improved method for operating an electrical system structure.
  • the current power requirement in the high-voltage network is therefore always recorded, at least during the charging process of the high-voltage battery, and compared with the total amount of power available on the high-voltage network side in the sense of a balancing.
  • the power requirement of all network components connected on the high-voltage network side and the specific amount of power to be delivered to the at least one low-voltage network are taken into account. If the high-voltage network power requirement exceeds the total amount of power available in the high-voltage network, there is a lack of power or insufficient power on the high-voltage network side.
  • the power of at least one network component connected there is reduced in the at least one low-voltage network, so that the power requirement of the low-voltage network caused by the operation of the at least one low-voltage network side network component is reduced. Accordingly, the amount of power supplied by the high-voltage network to the low-voltage network is also reduced. In extreme cases, the or at least one network component connected to the low-voltage network is completely switched off, or the low-voltage network is no longer supplied with electrical power via the high-voltage network. In this way, the proportion of electrical power that is no longer delivered to the low-voltage network can be used in the high-voltage network to operate one or more network components connected there.
  • the current power requirement in the high-voltage network is 90% of the total power available on the high-voltage network side
  • there can already be a reduction in the power of the at least one network component connected in the low-voltage network or a reduction in the amount of power delivered to the at least one low-voltage network.
  • at least one control device is advantageously provided for carrying out the method on both the high-voltage network side and the low-voltage network side, as will be explained in more detail below.
  • a control device for controlling the network components and for determining the current power consumption of the network is assigned to each network, the control device of the high-voltage network releasing information relating to the lack of power in the high-voltage network to the control device of at least one low-voltage network if there is a lack of power during the charging process of the high-voltage battery in the high-voltage network, wherein the control device of the at least one low-voltage network, with additional consideration of at least one boundary condition relating to the power consumption of at least one network component of the low-voltage network, reduces the power of at least one network component of the low-voltage network.
  • the control devices assigned to the respective networks are communicatively connected to one another, that is to say they preferably communicate directly with one another in order to exchange at least the information relating to the lack of power in the high-voltage network. Accordingly, a control device provided on the high-voltage network side Detected lack of power or the amount of power required in the high-voltage network to compensate for the lack of power in the form of the information relating to the lack of power in the high-voltage network is sent to a control device of a low-voltage network.
  • the low-voltage network-side control device then controls one or more low-voltage network-side network components in such a way that their output is reduced accordingly, so that the control device of the high-voltage network can correspondingly reduce the amount of power to be delivered to the low-voltage network.
  • the power reduction of the at least one network component connected on the low-voltage network is carried out with additional consideration of at least one boundary condition relating to the power consumption of at least one network component of the low-voltage network.
  • the boundary condition represents a list of rules, according to which it is determined, for example, how the power of the at least one network component connected in the at least one low-voltage network and the amount of power delivered by the high-voltage network to the at least one low-voltage network is at least partially reduced.
  • the control device of the respective low-voltage network therefore independently determines, based on the boundary conditions, which network components are reduced and how their power is reduced or switched off, that is to say which measures for reducing the power are implemented in a given case.
  • the boundary conditions can be specified at the factory and / or by the user.
  • the priorities assigned to the respective network components connected to the low-voltage network can determine, for example, the order in which the power is reduced in the case of several network components connected to the low-voltage network, or the order in which the network components on the low-voltage network are switched off. It is also conceivable not to prioritize certain low-voltage network components, so that they can be supplied with electrical power and thus operated. This can include, for example, security-relevant network components of the low-voltage network, such as B. an alarm system or vehicle-provided transmission and / or reception devices fall.
  • the prioritization preferably takes place as a function of a comfort restriction of one or more vehicle occupants due to the power reduction, the network components associated with the greatest comfort restriction ultimately being reduced in their performance. Accordingly, the power reduction of the network components connected on the low-voltage network side is hardly noticeable for the vehicle occupant (s).
  • Comfort-relevant network components which are therefore switched off last, can be, for example, entertainment and / or information devices which provide entertainment and / or information for the vehicle occupant or the seat heating. Consequently, network components that are not directly recognizable during operation are primarily reduced or switched off by the vehicle occupant (s).
  • the low-voltage battery always maintains at least one predetermined or predeterminable minimum charge state, despite the reduced amount of power delivered to the low-voltage network.
  • the amount of power released in the high-voltage network by reducing the amount of power delivered to the at least one low-voltage network can, for example, be supplied to at least one cooling device associated with at least one high-voltage battery and connected in the high-voltage network as a network component.
  • at least one cooling device associated with at least one high-voltage battery and connected in the high-voltage network as a network component.
  • the invention is also directed to a motor vehicle according to claim 7.
  • the motor vehicle is designed to carry out the method according to the invention as described above.
  • any performance deficiencies that may occur in the high-voltage network can be compensated for by at least partially reducing the power of the at least one network component connected in the at least one low-voltage network and the amount of power delivered by the high-voltage network to the at least one low-voltage network.
  • the motor vehicle is preferably an electric motor vehicle or hybrid motor vehicle with an at least partial electric drive.
  • a control device for controlling the at least one network component and for determining the current power consumption of the network is assigned to each network.
  • the control devices of the networks are designed for, in particular direct, communication with one another, that is to say that they can send and receive different information. Consequently, the control devices are connected to one another via at least one communication means.
  • Fig. 1 shows a schematic diagram of an electrical system structure 1 of a motor vehicle 2 designed as an electric motor vehicle, which motor vehicle 2 is only indicated by the dashed outline of the electrical system structure 1.
  • the vehicle electrical system structure 1 has two electrical networks 3, 4 with different network voltages, a high-voltage network 3 z. B. a mains voltage of 72 V and a low voltage network 4 z. B. has a mains voltage of 12 V.
  • the high-voltage network 3 supplies the low-voltage network 4 with electrical energy via a DC / DC converter 5, that is to say that a certain amount of power is delivered to the low-voltage network 4 from the total amount of power available in the high-voltage network 3.
  • Different network components 6 - 11 are connected both on the high-voltage network side and on the low-voltage network side.
  • a high-voltage battery 6 and various electrical consumers 7, 8 are provided on the high-voltage network side, wherein the dashed-line representation of the consumer 8 symbolizes that the consumer 8 can optionally also represent a plurality of electrical consumers.
  • a low-voltage battery 9 and corresponding consumers 10, 11 are provided on the low-voltage network side, the electrical consumer 11 in turn symbolized by the dashed line representation, possibly representing a plurality of electrical consumers.
  • a charger 12 is also connected in the high-voltage network 3, and consequently the motor vehicle 2 is in a state ready for charging, in which the high-voltage battery 6 is charged via the charger 12.
  • a control device 13, 14 is assigned to both the high-voltage network 3 and the low-voltage network 4.
  • the control device 13 of the high-voltage network 3 controls the operation and thus the power consumption of the network components 6 - 8 connected on the high-voltage network and additionally determines the current power consumption of the high-voltage network 3.
  • the control device 14 of the low-voltage network 4 controls the operation and thus the power consumption of the low-voltage network components 9 - 11 and determines the current power consumption of the network components 9-11 connected on the low-voltage network.
  • the control devices 13, 14 are connected to one another via a communication link 15 for direct communication.
  • the control device 13 of the high-voltage network 3 also compares the total power available in the high-voltage network 3 with the current power requirement arising from the operation of the high-voltage network side connected network components 6 - 8 in the sense of balancing the range of services available in the high-voltage network 3 and the current high-voltage network demand .
  • the amount of power output from the high-voltage network 3 via the DC / DC converter 5 to the low-voltage network 4 is also taken into account.
  • the lack of power is detected by the high-voltage network-side control device 13 as part of the creation of the power balance ⁇ P HV , and information relating to the lack of power in the high-voltage network 3 is passed on to the control device 14 of the low-voltage network 4 via the communication link 15, whereupon the control device 14 independently at least corresponding network components 9-11 partially reduced in power, so that overall the low-voltage network power consumption ⁇ P 9-11 is reduced by at least the amount of power required in the high-voltage network 3 of 1 kW.
  • the control device 13 of the high-voltage network 3 reduces the power quantity P DC / DC delivered to the low-voltage network 4 via the DC / DC converter 5 by 1 kW, so that the power balance in the high-voltage network 3 is no longer negative, but is balanced. Consequently, sufficient power is available in the high-voltage network 3 for the operation of the high-voltage network-side network components 7, 8, that is to say in particular for the operation of the cooling device associated with the high-voltage battery 6.
  • the high-voltage network side is therefore supplied by the reduction in the amount of power P DC / DC released to the low-voltage network 4 to the cooling device associated with the high-voltage battery 6 and connected in the high-voltage network 3 as network component 7.
  • the principle according to the invention applies equally to other high-voltage network-side network components 8, provided that these cannot be operated properly due to an acute lack of power on the high-voltage network side.
  • the low-voltage network-side control device 14 takes into account at least one the power consumption when reducing the power consumption ⁇ P 9-11 boundary condition relating to at least one network component 9-11 of the low-voltage network 4.
  • Priorities assigned to the respective network components 9-11 of the low-voltage network 4 by the control device 14 are preferably used as a boundary condition. It may be the case, for example, that the prioritization takes place as a function of a comfort restriction of one or more vehicle occupants of the motor vehicle 2 due to the power reduction, the performance of the network components 11 associated with the greatest comfort restriction being last reduced.
  • an entertainment and / or information device connected on the low-voltage network side can lastly be reduced or switched off in its output, so that the overall reduction in power consumption ⁇ P 9-11 of the low-voltage network 4 carried out within the scope of the method according to the invention is hardly noticeable for the vehicle occupant or passengers is.
  • it is preferably additionally provided to limit the charging current of the low-voltage battery 9 on the low-voltage network side in order to reduce the power in the low-voltage network 4, since a significant reduction in the power consumption ⁇ P 9-11 of the low-voltage network 4 can also be achieved by this measure. All of the measures taken in the low-voltage network 4 to reduce the power consumption ⁇ P 9-11 are preferably carried out on the premise that the low-voltage battery 9 is not discharged.
  • the original configuration or the original power consumption ⁇ P 9-11 of the low-voltage network components 9 - 11 can be returned.
  • a power excess of 1 kW now arises in the power balance of the high-voltage network 3.
  • the excess amount of power of 1 kW can then, as far as it is currently not otherwise used in the high-voltage network 3, be at least partially delivered to the low-voltage network 4 via the DC / DC converter 5.
  • control device 14 of the low-voltage network 4 can also transmit corresponding information relating to a power requirement in the low-voltage network 4 to the control device 13 of the high-voltage network 3 or a specific power requirement from Request high-voltage network 3, whereupon the high-voltage network 3 delivers a corresponding additional amount of power to the low-voltage network 4 insofar as there is an excess of power on the high-voltage network side.

Description

Die Erfindung betrifft ein Verfahren zum Betrieb einer Bordnetzstruktur eines Kraftfahrzeugs, welche Bordnetzstruktur wenigstens zwei elektrische Netze mit unterschiedlichen Netzspannungen aufweist, wobei ein Hochvoltnetz zur Leistungsversorgung wenigstens eines Niedervoltnetzes mit einer im Vergleich zum Hochvoltnetz niedrigeren Netzspannung eine bestimmte Leistungsmenge an das wenigstens eine Niedervoltnetz abgibt, wobei an jedem Netz wenigstens eine Netzkomponente, insbesondere ein elektrischer Verbraucher, angeschlossen ist und das Hochvoltnetz wenigstens eine an dieses angeschlossene Hochvoltbatterie aufweist.The invention relates to a method for operating an on-board electrical system structure of a motor vehicle, the on-board electrical system structure having at least two electrical networks with different network voltages, a high-voltage network for supplying power to at least one low-voltage network with a lower network voltage than the high-voltage network delivering a certain amount of power to the at least one low-voltage network, wherein at least one network component, in particular an electrical consumer, is connected to each network and the high-voltage network has at least one high-voltage battery connected to it.

Es sind Kraftfahrzeuge, insbesondere über einen elektrischen Antrieb verfügende Elektrokraftfahrzeuge, mit einer Bordnetzstruktur mit zwei oder mehr parallelen elektrischen Netzen bekannt, wobei sich die Netze in ihren Netzspannungen unterscheiden. Beispielsweise kann ein Hochvoltnetz, an welchem z. B. ein Antriebsaggregat angeschlossen ist, eine Netzspannung von 72 V und ein Niedervoltnetz, an dem z. B. unterschiedliche elektrische Verbraucher wie Unterhaltungs- oder Informationseinrichtungen für Fahrzeuginsassen oder dergleichen angeschlossen sind, eine Netzspannung von 12 V aufweisen. Grundsätzlich versorgt das Hochvoltnetz das oder wenigstens ein Niedervoltnetz insbesondere auch während des Ladevorgangs der Hochvoltbatterie des Hochvoltnetzes mit einer bestimmten Menge elektrischer Leistung zum Betrieb der am Niedervoltnetz angeschlossenen Netzkomponenten respektive elektrischen Verbraucher bzw. erfolgt über die hochvoltnetzseitig an das Niedervoltnetz abgegebene Leistungsmenge auch der Ladevorgang einer niedervoltnetzseitig angeschlossenen Niedervoltbatterie.Motor vehicles, in particular electric motor vehicles with an electrical drive, are known with an on-board network structure with two or more parallel electrical networks, the networks differing in their network voltages. For example, a high-voltage network on which, for. B. a drive unit is connected, a mains voltage of 72 V and a low voltage network, to which, for. B. different electrical consumers such as entertainment or information facilities for vehicle occupants or the like are connected, have a mains voltage of 12 V. In principle, the high-voltage network supplies the or at least one low-voltage network with a certain amount of electrical power, in particular also during the charging process of the high-voltage battery of the high-voltage network, for operating the network components or electrical consumers connected to the low-voltage network, or the amount of power delivered to the low-voltage network on the high-voltage network side is also used to charge a low-voltage network side connected low-voltage battery.

Bei bekannten Verfahren zum Betrieb einer Bordnetzstruktur ist es möglich, dass während des Ladevorgangs der Hochvoltbatterie ein Leistungsmangel bzw. eine Leistungsunterdeckung im Hochvoltnetz auftritt. Dieser ist insbesondere bedingt durch die an das Niedervoltnetz abgegebene Leistungsmenge respektive durch den Leistungsverbrauch der im Niedervoltnetz angeschlossenen Netzkomponenten. Konkret kann beispielsweise die Hochvoltbatterie des Hochvoltnetzes während des Ladevorgangs überhitzen, da eine die Hochvoltbatterie während des Ladevorgangs kühlende Kühlvorrichtung nicht ausreichend mit elektrischer Leistung versorgt werden kann.In known methods for operating an on-board electrical system structure, it is possible for a lack of power or under-performance in the high-voltage network to occur during the charging process of the high-voltage battery. This is special due to the amount of power delivered to the low-voltage network or the power consumption of the network components connected in the low-voltage network. Specifically, the high-voltage battery of the high-voltage network can overheat during the charging process, for example, since a cooling device that cools the high-voltage battery during the charging process cannot be supplied with sufficient electrical power.

In WO 2007/096720 A1 wird ein elektrisch angetriebenes Fahrzeug beschrieben, welches eine Hochvoltbatterie zum Betrieb einer elektrischen Maschine, eine Solarbatterie, einen Ladegleichspannungswandler, welche von der Solarbatterie erzeugte elektrische Leistung an die Hochvoltbatterie überträgt, sowie eine Niederspannungsbatterie umfasst. Die Niederspannungsbatterie ist mit der Hochvoltbatterie über einen Gleichspannungswandler verbunden. Weiterhin ist ein dritter Gleichspannungswandler vorgesehen, welcher die von der Solarbatterie erzeugte Spannung in die Spannung der Niedervoltbatterie wandelt. Bei einem Abschalten der Zündung werden zwei Relais geöffnet, welche die Hochvoltbatterie mit dem das Niederspannungsnetz versorgenden Gleichspannungswandler verbinden, um das Niederspannungsnetz von der Hochvoltbatterie abzukoppeln. Weiterhin wird eine über das Niedervoltnetz betriebene Überwachungseinheit abgeschaltet, um ein ungewünschtes Entladen der Niederspannungsbatterie des Niederspannungsnetzes im geparkten Zustand des Kraftfahrzeuges insbesondere bei einer unzureichenden von der Solarbatterie bereitgestellten Leistung zu verhindern.In WO 2007/096720 A1 describes an electrically powered vehicle that includes a high-voltage battery for operating an electrical machine, a solar battery, a charging DC / DC converter that transmits electrical power generated by the solar battery to the high-voltage battery, and a low-voltage battery. The low-voltage battery is connected to the high-voltage battery via a DC converter. Furthermore, a third DC-DC converter is provided, which converts the voltage generated by the solar battery into the voltage of the low-voltage battery. When the ignition is switched off, two relays are opened which connect the high-voltage battery to the direct-voltage converter supplying the low-voltage network in order to decouple the low-voltage network from the high-voltage battery. Furthermore, a monitoring unit operated via the low-voltage network is switched off in order to prevent undesired discharging of the low-voltage battery of the low-voltage network in the parked state of the motor vehicle, in particular in the event of insufficient power provided by the solar battery.

DE 10 2005 002 401 A1 beschreibt ein Kraftfahrzeugbordnetz mit einer 12 V-Batterie sowie einer weiteren Batterie mit einer Sekundärspannung von 42 V. Das Kraftfahrzeugbordnetz ist in zwei Teilnetze aufgeteilt, von denen eines eine Nennspannung von 14 V und das andere eine Nennspannung von 42 V aufweist. Zwischen den beiden Teilnetzen ist über einen Energiewandler Energie transportierbar. Über eine zentrale Recheneinheit wird die verfügbare Leistung, welche von den beiden Batterien und gegebenenfalls dem Energiewandler zur Verfügung gestellt werden kann, gleichmäßig an verschiedene Endverbraucher und gegebenenfalls an die Energiespeicher verteilt, ohne dass es zu einer Überlastung des Kraftfahrzeugbordnetzes kommt. Dazu ist jedem der zu versorgenden Verbraucher in Abhängigkeit von einem Gesamtzustand des Kraftfahrzeuges eine Priorität zugeordnet. DE 10 2005 002 401 A1 describes a motor vehicle electrical system with a 12 V battery and a further battery with a secondary voltage of 42 V. The motor vehicle electrical system is divided into two subnetworks, one of which has a nominal voltage of 14 V and the other has a nominal voltage of 42 V. Energy can be transported between the two sub-networks via an energy converter. The available power, which can be provided by the two batteries and, if appropriate, the energy converter, is distributed uniformly to various end users and, if appropriate, to the energy stores via a central computing unit, without that the vehicle electrical system is overloaded. For this purpose, a priority is assigned to each of the consumers to be supplied as a function of an overall condition of the motor vehicle.

Der Erfindung liegt daher das Problem zugrunde, ein verbessertes Verfahren zum Betrieb einer Bordnetzstruktur anzugeben.The invention is therefore based on the problem of specifying an improved method for operating an electrical system structure.

Das Problem wird erfindungsgemäß durch ein Verfahren nach Anspruch 1 und durch ein Kraftfahrzeug nach Anspruch 7 gelöst.The problem is solved according to the invention by a method according to claim 1 and by a motor vehicle according to claim 7.

Gemäß dem Verfahren wird demnach wenigstens während des Ladevorgangs der Hochvoltbatterie stets der aktuelle Leistungsbedarf im Hochvoltnetz erfasst und mit der insgesamt hochvoltnetzseitig zur Verfügung stehenden Leistungsmenge im Sinne einer Bilanzierung verglichen. Zur Ermittlung des aktuellen Leistungsbedarfs im Hochvoltnetz wird der zu deren Betrieb erforderliche Leistungsbedarf aller hochvoltnetzseitig angeschlossener Netzkomponenten sowie die an das wenigstens eine Niedervoltnetz abzugebende bestimmte Leistungsmenge berücksichtigt. Überschreitet der hochvoltnetzseitige Leistungsbedarf die im Hochvoltnetz insgesamt zur Verfügung stehende Leistungsmenge, liegt hochvoltnetzseitig ein Leistungsmangel respektive eine Leistungsunterdeckung vor. Zur Kompensation des Leistungsmangels wird in dem wenigstens einen Niedervoltnetz die Leistung wenigstens einer dort angeschlossenen Netzkomponente reduziert, so dass der durch den Betrieb der wenigstens einen niedervoltnetzseitigen Netzkomponente bedingte Leistungsbedarf des Niedervoltnetzes reduziert wird. Entsprechend wird die von dem Hochvoltnetz an das Niedervoltnetz gelieferte Leistungsmenge ebenfalls reduziert. Im Extremfall wird die oder wenigstens eine an das Niedervoltnetz angeschlossene Netzkomponente komplett abgeschaltet respektive das Niedervoltnetz nicht mehr über das Hochvoltnetz mit elektrischer Leistung versorgt. Derart kann der Anteil an elektrischer Leistung, der nun nicht mehr an das Niedervoltnetz abgegeben wird, im Hochvoltnetz zum Betrieb einer oder mehrerer dort angeschlossener Netzkomponenten verwendet werden.According to the method, the current power requirement in the high-voltage network is therefore always recorded, at least during the charging process of the high-voltage battery, and compared with the total amount of power available on the high-voltage network side in the sense of a balancing. To determine the current power requirement in the high-voltage network, the power requirement of all network components connected on the high-voltage network side and the specific amount of power to be delivered to the at least one low-voltage network are taken into account. If the high-voltage network power requirement exceeds the total amount of power available in the high-voltage network, there is a lack of power or insufficient power on the high-voltage network side. To compensate for the lack of power, the power of at least one network component connected there is reduced in the at least one low-voltage network, so that the power requirement of the low-voltage network caused by the operation of the at least one low-voltage network side network component is reduced. Accordingly, the amount of power supplied by the high-voltage network to the low-voltage network is also reduced. In extreme cases, the or at least one network component connected to the low-voltage network is completely switched off, or the low-voltage network is no longer supplied with electrical power via the high-voltage network. In this way, the proportion of electrical power that is no longer delivered to the low-voltage network can be used in the high-voltage network to operate one or more network components connected there.

Es ist auch denkbar, bereits bei Annäherung des aktuellen Leistungsbedarfs im Hochvoltnetz an die dort insgesamt zur Verfügung stehende Leistungsmenge entsprechend die Leistung der wenigstens einen in dem wenigstens einen Niedervoltnetz angeschlossenen Netzkomponente und die von dem Hochvoltnetz an das wenigstens eine Niedervoltnetz abgegebene Leistungsmenge wenigstens teilweise zu reduzieren. Hierbei können vorgegebene oder vorgebbare Werte für das Verhältnis von aktuellem hochvoltnetzseitigen Leistungsbedarf und insgesamt hochvoltnetzseitig zur Verfügung stehender Leistung verwendet werden. So kann beispielsweise für den Fall, dass der aktuelle Leistungsbedarf im Hochvoltnetz 90% der insgesamt hochvoltnetzseitig zur Verfügung stehenden Leistung beträgt, bereits eine Reduzierung der Leistung der wenigstens einen im Niedervoltnetz angeschlossenen Netzkomponente respektive eine Reduzierung der an das wenigstens eine Niedervoltnetz abgegebenen Leistungsmenge erfolgen. Selbstverständlich ist zur Durchführung des Verfahrens vorteilhaft sowohl hochvoltnetzseitig als auch niedervoltnetzseitig jeweils wenigstens eine Steuereinrichtung vorgesehen, wie im Folgenden näher erläutert wird.It is also conceivable to reduce the power of the at least one network component connected in the at least one low-voltage network and the amount of power delivered by the high-voltage network to the at least one low-voltage network at least partially as soon as the current power requirement in the high-voltage network is approximated to the total amount of power available there . In this case, predetermined or predeterminable values can be used for the ratio of the current high-voltage network power requirement and the total power available on the high-voltage network side. For example, in the event that the current power requirement in the high-voltage network is 90% of the total power available on the high-voltage network side, there can already be a reduction in the power of the at least one network component connected in the low-voltage network, or a reduction in the amount of power delivered to the at least one low-voltage network. Of course, at least one control device is advantageously provided for carrying out the method on both the high-voltage network side and the low-voltage network side, as will be explained in more detail below.

Jedem Netz ist eine Steuereinrichtung zur Steuerung der Netzkomponenten und zur Ermittlung des aktuellen Leistungsverbrauchs des Netzes zugeordnet, wobei die Steuereinrichtung des Hochvoltnetzes bei einem während des Ladevorgangs der Hochvoltbatterie im Hochvoltnetz auftretenden Leistungsmangel eine den Leistungsmangel im Hochvoltnetz betreffende Information an die Steuereinrichtung wenigstens eines Niedervoltnetzes abgibt, wobei die Steuereinrichtung des wenigstens eines Niedervoltnetzes unter zusätzlicher Berücksichtigung wenigstens einer den Leistungsverbrauch wenigstens einer Netzkomponente des Niedervoltnetzes betreffenden Randbedingung die Leistung wenigstens einer Netzkomponente des Niedervoltnetzes reduziert. Die den jeweiligen Netzen zugeordneten Steuereinrichtungen sind kommunizierend miteinander verbunden, das heißt kommunizieren zum Austausch wenigstens der den Leistungsmangel im Hochvoltnetz betreffenden Information bevorzugt direkt miteinander. Entsprechend kann ein über eine hochvoltnetzseitig vorgesehene Steuereinrichtung erfasster Leistungsmangel respektive die im Hochvoltnetz zur Kompensation des Leistungsmangels erforderliche Leistungsmenge betragsmäßig in Form der den Leistungsmangel im Hochvoltnetz betreffenden Information an eine Steuereinrichtung eines Niedervoltnetzes geleitet werden. Die niedervoltnetzseitige Steuereinrichtung steuert daraufhin eine oder mehrere niedervoltnetzseitige Netzkomponenten derart an, dass diese entsprechend in ihrer Leistung reduziert werden, so dass die Steuereinrichtung des Hochvoltnetzes den Betrag der an das Niedervoltnetz abzugebenden Leistungsmenge entsprechend reduzieren kann.A control device for controlling the network components and for determining the current power consumption of the network is assigned to each network, the control device of the high-voltage network releasing information relating to the lack of power in the high-voltage network to the control device of at least one low-voltage network if there is a lack of power during the charging process of the high-voltage battery in the high-voltage network, wherein the control device of the at least one low-voltage network, with additional consideration of at least one boundary condition relating to the power consumption of at least one network component of the low-voltage network, reduces the power of at least one network component of the low-voltage network. The control devices assigned to the respective networks are communicatively connected to one another, that is to say they preferably communicate directly with one another in order to exchange at least the information relating to the lack of power in the high-voltage network. Accordingly, a control device provided on the high-voltage network side Detected lack of power or the amount of power required in the high-voltage network to compensate for the lack of power in the form of the information relating to the lack of power in the high-voltage network is sent to a control device of a low-voltage network. The low-voltage network-side control device then controls one or more low-voltage network-side network components in such a way that their output is reduced accordingly, so that the control device of the high-voltage network can correspondingly reduce the amount of power to be delivered to the low-voltage network.

Grundsätzlich wird die Leistungsreduzierung der wenigstens einen niedervoltnetzseitig angeschlossenen Netzkomponente unter zusätzlicher Berücksichtigung wenigstens einer den Leistungsverbrauch wenigstens einer Netzkomponente des Niedervoltnetzes betreffenden Randbedingung durchgeführt. Die Randbedingung stellt eine Regelliste dar, wonach beispielsweise festgelegt wird, wie die Leistung der wenigstens einen in dem wenigstens einen Niedervoltnetz angeschlossenen Netzkomponente und die von dem Hochvoltnetz an das wenigstens eine Niedervoltnetz abgegebene Leistungsmenge wenigstens teilweise reduziert wird. Mithin stellt die Steuereinrichtung des jeweiligen Niedervoltnetzes anhand der Randbedingungen selbständig fest, welche Netzkomponenten wie in ihrer Leistung reduziert respektive abgeschaltet werden, das heißt, welche Maßnahmen zur Leistungsreduzierung in einem gegebenen Fall realisiert werden. Die Randbedingungen können werks- und/oder benutzerseitig vorgegeben werden.Basically, the power reduction of the at least one network component connected on the low-voltage network is carried out with additional consideration of at least one boundary condition relating to the power consumption of at least one network component of the low-voltage network. The boundary condition represents a list of rules, according to which it is determined, for example, how the power of the at least one network component connected in the at least one low-voltage network and the amount of power delivered by the high-voltage network to the at least one low-voltage network is at least partially reduced. The control device of the respective low-voltage network therefore independently determines, based on the boundary conditions, which network components are reduced and how their power is reduced or switched off, that is to say which measures for reducing the power are implemented in a given case. The boundary conditions can be specified at the factory and / or by the user.

Es ist in diesem Zusammenhang denkbar, als Randbedingung den jeweiligen Netzkomponenten des wenigstens einen Niedervoltnetzes von der Steuereinrichtung zugewiesene Prioritäten zu verwenden. Entsprechend kann beispielsweise durch die den jeweiligen niedervoltnetzseitig angeschlossenen Netzkomponenten zugeordneten Prioritäten festgelegt sein, in welcher Reihenfolge im Falle von mehreren niedervoltnetzseitig angeschlossenen Netzkomponenten die Leistung reduziert wird bzw. in welcher Reihenfolge niedervoltnetzseitige Netzkomponenten abgeschaltet werden. Es ist auch denkbar, bestimmte niedervoltnetzseitige Netzkomponenten nicht zu priorisieren, so dass diese jedenfalls mit elektrischer Leistung versorgt und somit betrieben werden können. Hierunter können beispielsweise sicherheitsrelevante Netzkomponenten des Niedervoltnetzes wie z. B. eine Alarmanlage oder kraftfahrzeugseitig vorgesehene Sende- und/oder Empfangseinrichtungen fallen.In this context, it is conceivable to use priorities assigned to the respective network components of the at least one low-voltage network by the control device as a boundary condition. Accordingly, the priorities assigned to the respective network components connected to the low-voltage network can determine, for example, the order in which the power is reduced in the case of several network components connected to the low-voltage network, or the order in which the network components on the low-voltage network are switched off. It is also conceivable not to prioritize certain low-voltage network components, so that they can be supplied with electrical power and thus operated. This can include, for example, security-relevant network components of the low-voltage network, such as B. an alarm system or vehicle-provided transmission and / or reception devices fall.

Die Priorisierung erfolgt bevorzugt in Abhängigkeit einer durch die Leistungsreduzierung bedingten Komforteinschränkung eines oder mehrerer Fahrzeuginsassen, wobei die mit der größten Komforteinschränkung verbundenen Netzkomponenten zuletzt in ihrer Leistung reduziert werden. Entsprechend ist die Leistungsreduzierung der niedervoltnetzseitig angeschlossenen Netzkomponenten für den oder die Fahrzeuginsassen kaum spürbar. Komfortrelevante Netzkomponenten, welche demnach zuletzt abgeschaltet werden, können beispielsweise Unterhaltungs- und/oder Informationseinrichtungen, welche dem oder den Fahrzeuginsassen ein Unterhaltungs- und/oder Informationsangebot liefern, oder eine Sitzheizung sein. Mithin werden also von dem oder den Fahrzeuginsassen nicht unmittelbar im Betrieb erkennbare Netzkomponenten vorrangig in ihrer Leistung reduziert bzw. abgeschaltet.The prioritization preferably takes place as a function of a comfort restriction of one or more vehicle occupants due to the power reduction, the network components associated with the greatest comfort restriction ultimately being reduced in their performance. Accordingly, the power reduction of the network components connected on the low-voltage network side is hardly noticeable for the vehicle occupant (s). Comfort-relevant network components, which are therefore switched off last, can be, for example, entertainment and / or information devices which provide entertainment and / or information for the vehicle occupant or the seat heating. Consequently, network components that are not directly recognizable during operation are primarily reduced or switched off by the vehicle occupant (s).

Ferner ist es denkbar, als Randbedingung vorzusehen, wenigstens eine in dem wenigstens einen Niedervoltnetz angeschlossene Niedervoltbatterie nicht zu entladen. Die Niedervoltbatterie hält derart trotz der reduzierten an das Niedervoltnetz abgegebenen Leistungsmenge stets wenigstens einen vorgegebenen oder vorgebbaren Mindestladezustand ein.Furthermore, it is conceivable to provide as a boundary condition not to discharge at least one low-voltage battery connected in the at least one low-voltage network. In this way, the low-voltage battery always maintains at least one predetermined or predeterminable minimum charge state, despite the reduced amount of power delivered to the low-voltage network.

Zur Leistungsreduzierung in wenigstens einem Niedervoltnetz kann es zudem vorgesehen sein, den Ladestrom wenigstens einer in dem wenigstens einen Niedervoltnetz angeschlossenen Niedervoltbatterie zu begrenzen. Beispielsweise wäre es ohne Ladestrombegrenzung möglich, dass eine elektrische Leistung von bis zu 1,5 kW an eine Niedervoltbatterie abgegeben wird, weshalb auch durch eine entsprechende Ladestrombegrenzung einer Niedervoltbatterie der Leistungsverbrauch des wenigstens einen Niedervoltnetzes reduziert werden kann.To reduce the power in at least one low-voltage network, provision can also be made to limit the charging current of at least one low-voltage battery connected in the at least one low-voltage network. For example, without charging current limitation, it would be possible for an electrical power of up to 1.5 kW to be delivered to a low-voltage battery, which is why the power consumption of the at least one low-voltage network can also be reduced by a corresponding charging current limitation of a low-voltage battery.

Die durch die Reduzierung der an das wenigstens eine Niedervoltnetz abgegebenen Leistungsmenge in dem Hochvoltnetz freiwerdende Leistungsmenge kann beispielsweise wenigstens einer wenigstens einer Hochvoltbatterie zugeordneten, in dem Hochvoltnetz als Netzkomponente angeschlossenen Kühlvorrichtung zugeführt werden. Sonach ist dem eingangs beschriebenen Fall der Überhitzung der Hochvoltbatterie während des Ladevorgangs bedingt durch die nicht ausreichende Kühlung durch die Kühlvorrichtung Rechnung getragen. Es steht hochvoltnetzseitig ausreichend Leistung zum Betrieb der Kühlvorrichtung zur Verfügung, sonach wird die Hochvoltbatterie während des Ladevorgangs hinreichend gekühlt und insbesondere nicht durch Überhitzung beschädigt.The amount of power released in the high-voltage network by reducing the amount of power delivered to the at least one low-voltage network can, for example, be supplied to at least one cooling device associated with at least one high-voltage battery and connected in the high-voltage network as a network component. Thus, the case of overheating of the high-voltage battery during the charging process described in the introduction due to the insufficient cooling by the cooling device is taken into account. Sufficient power is available on the high-voltage network side to operate the cooling device, so the high-voltage battery is adequately cooled during the charging process and in particular is not damaged by overheating.

Die Erfindung richtet sich zusätzlich auf ein Kraftfahrzeug gemäß Anspruch 7. Dabei ist das Kraftfahrzeug zur Durchführung des erfindungsgemäßen Verfahrens, wie oben beschrieben, ausgebildet.The invention is also directed to a motor vehicle according to claim 7. The motor vehicle is designed to carry out the method according to the invention as described above.

Entsprechend können während des Ladevorgangs wenigstens einer in einem Hochvoltnetz angeschlossenen Hochvoltbatterie gegebenenfalls auftretende Leistungsmängel im Hochvoltnetz kompensiert werden, indem die Leistung der wenigstens einen in dem wenigstens einem Niedervoltnetz angeschlossenen Netzkomponente und die von dem Hochvoltnetz an das wenigstens eine Niedervoltnetz abgegebene Leistungsmenge wenigstens teilweise reduziert wird.Accordingly, during the charging process at least one high-voltage battery connected in a high-voltage network, any performance deficiencies that may occur in the high-voltage network can be compensated for by at least partially reducing the power of the at least one network component connected in the at least one low-voltage network and the amount of power delivered by the high-voltage network to the at least one low-voltage network.

Das Kraftfahrzeug ist bevorzugt ein Elektrokraftfahrzeug oder Hybridkraftfahrzeug mit einem wenigstens teilweisen elektrischen Antrieb.The motor vehicle is preferably an electric motor vehicle or hybrid motor vehicle with an at least partial electric drive.

Erfindungsgemäß ist jedem Netz eine Steuereinrichtung zur Steuerung der wenigstens einen Netzkomponente und zur Ermittlung des aktuellen Leistungsverbrauchs des Netzes zugeordnet. Die Steuereinrichtungen der Netze sind zur, insbesondere direkten, Kommunikation miteinander ausgebildet, das heißt, diese können unterschiedliche Informationen senden und empfangen. Folglich sind die Steuereinrichtungen über wenigstens ein Kommunikationsmittel miteinander verbunden.According to the invention, a control device for controlling the at least one network component and for determining the current power consumption of the network is assigned to each network. The control devices of the networks are designed for, in particular direct, communication with one another, that is to say that they can send and receive different information. Consequently, the control devices are connected to one another via at least one communication means.

Weitere Vorteile der Erfindung ergeben sich aus den im folgenden beschriebenen Ausführungsbeispielen sowie anhand der Zeichnungen. Dabei zeigen:

Fig. 1
eine Prinzipdarstellung einer Bordnetzstruktur eines Kraftfahrzeugs; und
Fig. 2
eine Prinzipdarstellung des Ablaufs des Verfahrens.
Further advantages of the invention result from the exemplary embodiments described below and from the drawings. Show:
Fig. 1
a schematic diagram of an electrical system structure of a motor vehicle; and
Fig. 2
a schematic representation of the sequence of the method.

Fig. 1 zeigt eine Prinzipdarstellung einer Bordnetzstruktur 1 eines als Elektrokraftfahrzeug ausgebildeten Kraftfahrzeugs 2, welches Kraftfahrzeug 2 lediglich durch die strichlinierte Umrandung der Bordnetzstruktur 1 angedeutet ist. Die Bordnetzstruktur 1 weist zwei elektrische Netze 3, 4 mit unterschiedlichen Netzspannungen auf, wobei ein Hochvoltnetz 3 z. B. eine Netzspannung von 72 V und ein Niedervoltnetz 4 z. B. eine Netzspannung von 12 V aufweist. Das Hochvoltnetz 3 versorgt das Niedervoltnetz 4 über einen DC/DC-Wandler 5 mit elektrischer Energie, das heißt, es wird aus der in dem Hochvoltnetz 3 zur Verfügung stehenden Gesamtleistungsmenge eine bestimmte Leistungsmenge an das Niedervoltnetz 4 abgegeben. Sowohl hochvoltnetzseitig als auch niedervoltnetzseitig sind unterschiedliche Netzkomponenten 6 - 11 angeschlossen. Dabei sind hochvoltnetzseitig eine Hochvoltbatterie 6 sowie verschiedene elektrische Verbraucher 7, 8 vorgesehen, wobei durch die strichlinierte Darstellung des Verbrauchers 8 symbolisiert wird, dass der Verbraucher 8 gegebenenfalls auch für eine Mehrzahl an elektrischen Verbrauchern stehen kann. Analog sind niedervoltnetzseitig eine Niedervoltbatterie 9 sowie entsprechende Verbraucher 10, 11 vorgesehen, wobei der elektrische Verbraucher 11 wiederum symbolisiert durch die strichlinierte Darstellung gegebenenfalls für eine Mehrzahl an elektrischen Verbrauchern stehen kann. Im Hochvoltnetz 3 ist ferner ein Ladegerät 12 angeschlossen, mithin befindet sich das Kraftfahrzeug 2 in einem ladebereit abgestellten Zustand, in dem die Hochvoltbatterie 6 über das Ladegerät 12 geladen wird. Fig. 1 shows a schematic diagram of an electrical system structure 1 of a motor vehicle 2 designed as an electric motor vehicle, which motor vehicle 2 is only indicated by the dashed outline of the electrical system structure 1. The vehicle electrical system structure 1 has two electrical networks 3, 4 with different network voltages, a high-voltage network 3 z. B. a mains voltage of 72 V and a low voltage network 4 z. B. has a mains voltage of 12 V. The high-voltage network 3 supplies the low-voltage network 4 with electrical energy via a DC / DC converter 5, that is to say that a certain amount of power is delivered to the low-voltage network 4 from the total amount of power available in the high-voltage network 3. Different network components 6 - 11 are connected both on the high-voltage network side and on the low-voltage network side. In this case, a high-voltage battery 6 and various electrical consumers 7, 8 are provided on the high-voltage network side, wherein the dashed-line representation of the consumer 8 symbolizes that the consumer 8 can optionally also represent a plurality of electrical consumers. Analogously, a low-voltage battery 9 and corresponding consumers 10, 11 are provided on the low-voltage network side, the electrical consumer 11 in turn symbolized by the dashed line representation, possibly representing a plurality of electrical consumers. A charger 12 is also connected in the high-voltage network 3, and consequently the motor vehicle 2 is in a state ready for charging, in which the high-voltage battery 6 is charged via the charger 12.

Sowohl dem Hochvoltnetz 3 als auch dem Niedervoltnetz 4 ist jeweils eine Steuereinrichtung 13, 14 zugeordnet. Die Steuereinrichtung 13 des Hochvoltnetzes 3 steuert den Betrieb und somit den Leistungsverbrauch der hochvoltnetzseitig angeschlossenen Netzkomponenten 6 - 8 und ermittelt zusätzlich den aktuellen Leistungsverbrauch des Hochvoltnetzes 3. Entsprechend steuert die Steuereinrichtung 14 des Niedervoltnetzes 4 den Betrieb und somit den Leistungsverbrauch der niedervoltnetzseitig angeschlossenen Netzkomponenten 9 - 11 und ermittelt den aktuellen Leistungsverbrauch der niedervoltnetzseitig angeschlossenen Netzkomponenten 9 - 11. Die Steuereinrichtungen 13, 14 sind über eine Kommunikationsverbindung 15 zur direkten Kommunikation miteinander verbunden.
Die Steuereinrichtung 13 des Hochvoltnetzes 3 vergleicht ferner die im Hochvoltnetz 3 zur Verfügung stehende Gesamtleistung mit dem aktuellen, durch den Betrieb der hochvoltnetzseitig angeschlossenen Netzkomponenten 6 - 8 entstehenden Leistungsbedarf im Sinne einer Bilanzierung des im Hochvoltnetz 3 zur Verfügung stehenden Leistungsangebots und der aktuellen hochvoltnetzseitig bestehenden Leistungsnachfrage. Hierbei wird auch die vom Hochvoltnetz 3 über den DC/DC-Wandler 5 an das Niedervoltnetz 4 abgegebene Leistungsmenge berücksichtigt.A control device 13, 14 is assigned to both the high-voltage network 3 and the low-voltage network 4. The control device 13 of the high-voltage network 3 controls the operation and thus the power consumption of the network components 6 - 8 connected on the high-voltage network and additionally determines the current power consumption of the high-voltage network 3. Accordingly, the control device 14 of the low-voltage network 4 controls the operation and thus the power consumption of the low-voltage network components 9 - 11 and determines the current power consumption of the network components 9-11 connected on the low-voltage network. The control devices 13, 14 are connected to one another via a communication link 15 for direct communication.
The control device 13 of the high-voltage network 3 also compares the total power available in the high-voltage network 3 with the current power requirement arising from the operation of the high-voltage network side connected network components 6 - 8 in the sense of balancing the range of services available in the high-voltage network 3 and the current high-voltage network demand . The amount of power output from the high-voltage network 3 via the DC / DC converter 5 to the low-voltage network 4 is also taken into account.

Anhand von Fig. 2 wird der prinzipielle Ablauf des Verfahrens an einem konkreten Beispiel erläutert. Ausgehend von dem Ladevorgang der hochvoltnetzseitig angeschlossenen Hochvoltbatterie 6 über das mit einer externen Energiequelle (nicht gezeigt) verbundene Ladegerät 12 steht im Hochvoltnetz 3 beispielsweise insgesamt eine elektrische Leistung Ptot von insgesamt 3 kW zur Verfügung. Es ist zunächst noch über die hochvoltnetzseitige Steuereinrichtung 13 festgelegt, dass aus dem Hochvoltnetz 3 eine Leistungsmenge PDC/DC von 2 kW über den DC/DC-Wandler 5 an das Niedervoltnetz 4 zum Betrieb der dort angeschlossenen Netzkomponenten 10, 11 respektive zum Laden der Niedervoltbatterie 9 abgegeben wird, so dass im Hochvoltnetz 3 zum Betrieb der dort angeschlossenen Netzkomponenten 7, 8 letztlich eine Leistungsmenge von 1 kW zur Verfügung steht. Wird nun z. B. zur Kühlung der Hochvoltbatterie 6 über eine Netzkomponente 7 in Form einer entsprechenden Kühleinrichtung eine Leistungsmenge von wenigstens 2 kW angefordert, ergibt die Leistungsbilanz ΔPHV im Hochvoltnetz 3, welche sich aus der Differenz der gesamten hochvoltnetzseitig zur Verfügung stehenden Leistung Ptot und der tatsächlich hochvoltnetzseitig benötigten Leistung Σ P6-9 ergibt, einen Betrag von -1 kW, entsprechend liegt hochvoltnetzseitig ein Leistungsmangel von 1 kW vor.Based on Fig. 2 the basic sequence of the procedure is explained using a concrete example. Starting from the charging process of the high-voltage battery 6 connected on the high-voltage network side via the charger 12 connected to an external energy source (not shown), an electrical power P tot of a total of 3 kW is available in the high-voltage network 3, for example. It is initially determined via the high-voltage network-side control device 13 that from the high-voltage network 3 a power quantity P DC / DC of 2 kW via the DC / DC converter 5 to the low-voltage network 4 for operating the network components 10, 11 connected there or for charging the Low-voltage battery 9 is emitted, so that in the high-voltage network 3, an amount of power of 1 kW is ultimately available for operating the network components 7, 8 connected there. Now z. B. for cooling the high-voltage battery 6 via a network component 7 in the form of a corresponding cooling device, a power quantity of at least 2 kW is requested, results in the power balance ΔP HV in the high-voltage network 3, which results from the difference between the total power P tot available on the high-voltage network side and the actual power power required on the high-voltage network side Σ P 6-9 results in an amount of -1 kW, accordingly there is a lack of power on the high-voltage network side of 1 kW.

Der Leistungsmangel wird im Rahmen der Erstellung der Leistungsbilanz ΔPHV von der hochvoltnetzseitigen Steuereinrichtung 13 erfasst und eine den Leistungsmangel im Hochvoltnetz 3 betreffende Information über die Kommunikationsverbindung 15 an die Steuereinrichtung 14 des Niedervoltnetzes 4 gegeben, woraufhin die Steuereinrichtung 14 selbständig entsprechende Netzkomponenten 9 - 11 wenigstens teilweise in ihrer Leistung reduziert, so dass sich insgesamt der niedervoltnetzseitige Leistungsverbrauch Σ P9-11 wenigstens um die im Hochvoltnetz 3 benötigte Leistungsmenge von 1 kW verringert. Gleichermaßen reduziert die Steuereinrichtung 13 des Hochvoltnetzes 3 die über den DC/DC-Wandler 5 an das Niedervoltnetz 4 abgegebene Leistungsmenge PDC/DC um 1 kW, so dass die Leistungsbilanz im Hochvoltnetz 3 nicht mehr negativ ausfällt, sondern ausgeglichen ist. Folglich steht im Hochvoltnetz 3 ausreichend Leistung für den Betrieb der hochvoltnetzseitigen Netzkomponenten 7, 8, das heißt insbesondere für den Betrieb der der Hochvoltbatterie 6 zugeordneten Kühlvorrichtung zur Verfügung. Mithin wird die hochvoltnetzseitig durch die Reduzierung der an das Niedervoltnetz 4 abgegebenen Leistungsmenge PDC/DC freiwerdende Leistungsmenge der der Hochvoltbatterie 6 zugeordneten, in dem Hochvoltnetz 3 als Netzkomponente 7 angeschlossenen Kühlvorrichtung zugeführt. Selbstverständlich gilt das erfindungsgemäße Prinzip gleichermaßen für andere, hochvoltnetzseitige Netzkomponenten 8, sofern diese aufgrund eines akuten hochvoltnetzseitigen Leistungsmangels nicht ordnungsgemäß betrieben werden können.The lack of power is detected by the high-voltage network-side control device 13 as part of the creation of the power balance ΔP HV , and information relating to the lack of power in the high-voltage network 3 is passed on to the control device 14 of the low-voltage network 4 via the communication link 15, whereupon the control device 14 independently at least corresponding network components 9-11 partially reduced in power, so that overall the low-voltage network power consumption Σ P 9-11 is reduced by at least the amount of power required in the high-voltage network 3 of 1 kW. Likewise, the control device 13 of the high-voltage network 3 reduces the power quantity P DC / DC delivered to the low-voltage network 4 via the DC / DC converter 5 by 1 kW, so that the power balance in the high-voltage network 3 is no longer negative, but is balanced. Consequently, sufficient power is available in the high-voltage network 3 for the operation of the high-voltage network-side network components 7, 8, that is to say in particular for the operation of the cooling device associated with the high-voltage battery 6. The high-voltage network side is therefore supplied by the reduction in the amount of power P DC / DC released to the low-voltage network 4 to the cooling device associated with the high-voltage battery 6 and connected in the high-voltage network 3 as network component 7. Of course, the principle according to the invention applies equally to other high-voltage network-side network components 8, provided that these cannot be operated properly due to an acute lack of power on the high-voltage network side.

Die niedervoltnetzseitige Steuereinrichtung 14 berücksichtigt bei der Reduzierung des Leistungsverbrauchs Σ P9-11 wenigstens eine den Leistungsverbrauch wenigstens einer Netzkomponente 9 - 11 des Niedervoltnetzes 4 betreffende Randbedingung. Bevorzugt werden dabei als Randbedingung den jeweiligen Netzkomponenten 9 - 11 des Niedervoltnetzes 4 von der Steuereinrichtung 14 zugewiesene Prioritäten verwendet. Hierbei kann es beispielsweise sein, dass die Priosierung in Abhängigkeit einer durch die Leistungsreduzierung bedingten Komforteinschränkung eines oder mehrerer Fahrzeuginsassen des Kraftfahrzeugs 2 erfolgt, wobei die mit der größten Komforteinschränkung verbundenen Netzkomponenten 11 zuletzt in ihrer Leistung reduziert werden. Demnach kann etwa eine niedervoltnetzseitig angeschlossene Unterhaltungs- und/oder Informationseinrichtung zuletzt in ihrer Leistung reduziert bzw. abgeschaltet werden, so dass die insgesamt im Rahmen des erfindungsgemäßen Verfahrens durchgeführte Reduzierung des Leistungsverbrauchs Σ P9-11 des Niedervoltnetzes 4 für den oder die Fahrzeuginsassen kaum spürbar ist. Ferner ist bevorzugt zusätzlich vorgesehen, zur Leistungsreduzierung in dem Niedervoltnetz 4 den Ladestrom der niedervoltnetzseitigen Niedervoltbatterie 9 zu begrenzen, da auch über diese Maßnahme eine erhebliche Reduzierung des Leistungsverbrauchs Σ P9-11 des Niedervoltnetzes 4 realisiert werden kann. Sämtliche im Niedervoltnetz 4 zur Reduzierung des Leistungsverbrauchs Σ P9-11 getroffenen Maßnahmen erfolgen zudem bevorzugt unter der Prämisse, dass die Niedervoltbatterie 9 nicht entladen wird.The low-voltage network-side control device 14 takes into account at least one the power consumption when reducing the power consumption Σ P 9-11 boundary condition relating to at least one network component 9-11 of the low-voltage network 4. Priorities assigned to the respective network components 9-11 of the low-voltage network 4 by the control device 14 are preferably used as a boundary condition. It may be the case, for example, that the prioritization takes place as a function of a comfort restriction of one or more vehicle occupants of the motor vehicle 2 due to the power reduction, the performance of the network components 11 associated with the greatest comfort restriction being last reduced. Accordingly, an entertainment and / or information device connected on the low-voltage network side can lastly be reduced or switched off in its output, so that the overall reduction in power consumption Σ P 9-11 of the low-voltage network 4 carried out within the scope of the method according to the invention is hardly noticeable for the vehicle occupant or passengers is. Furthermore, it is preferably additionally provided to limit the charging current of the low-voltage battery 9 on the low-voltage network side in order to reduce the power in the low-voltage network 4, since a significant reduction in the power consumption Σ P 9-11 of the low-voltage network 4 can also be achieved by this measure. All of the measures taken in the low-voltage network 4 to reduce the power consumption Σ P 9-11 are preferably carried out on the premise that the low-voltage battery 9 is not discharged.

Nach Abschluss des Ladevorgangs der Hochvoltbatterie 6 kann grundsätzlich zu der ursprünglichen Konfiguration respektive dem ursprünglichen Leistungsverbrauch Σ P9-11 der niedervoltnetzseitigen Netzkomponenten 9 - 11 zurückgekehrt werden. Durch den Wegfall des Leistungsbedarfs der hochvoltnetzseitigen Kühlvorrichtung entsteht in der Leistungsbilanz des Hochvoltnetzes 3 nunmehr ein Leistungsüberschuss von 1 kW. Die überschüssige Leistungsmenge von 1 kW kann dann, soweit im Hochvoltnetz 3 aktuell nicht anderweitig verwendbar, über den DC/DC-Wandler 5 wenigstens teilweise an das Niedervoltnetz 4 abgegeben werden. Mithin kann auch die Steuereinrichtung 14 des Niedervoltnetzes 4 eine entsprechende, einen Leistungsbedarf im Niedervoltnetz 4 betreffende Information an die Steuereinrichtung 13 des Hochvoltnetzes 3 abgeben bzw. einen bestimmten Leistungsbedarf vom Hochvoltnetz 3 anfordern, woraufhin das Hochvoltnetz 3 soweit ein hochvoltnetzseitiger Leistungsüberschuss besteht, eine entsprechende zusätzliche Leistungsmenge an das Niedervoltnetz 4 abgibt.After the charging process of the high-voltage battery 6 has been completed, the original configuration or the original power consumption Σ P 9-11 of the low-voltage network components 9 - 11 can be returned. By eliminating the power requirement of the cooling device on the high-voltage network side, a power excess of 1 kW now arises in the power balance of the high-voltage network 3. The excess amount of power of 1 kW can then, as far as it is currently not otherwise used in the high-voltage network 3, be at least partially delivered to the low-voltage network 4 via the DC / DC converter 5. Accordingly, the control device 14 of the low-voltage network 4 can also transmit corresponding information relating to a power requirement in the low-voltage network 4 to the control device 13 of the high-voltage network 3 or a specific power requirement from Request high-voltage network 3, whereupon the high-voltage network 3 delivers a corresponding additional amount of power to the low-voltage network 4 insofar as there is an excess of power on the high-voltage network side.

Claims (7)

  1. Method for operating an onboard power supply of a motor vehicle (2), which onboard power supply (1) has at least two electrical networks (3, 4) with different network voltages, wherein a high-voltage network (3) for supplying with power at least one low-voltage network (4) with a network voltage which is low in comparison to the high-voltage network (3) submits a specified power quantity to the at least one low-voltage network (4), wherein to each network is connected at least one network component (6 - 11), in particular an electrical load, and the high-voltage network (3) has at least one high-voltage battery (6) attached thereto,
    wherein in the case of a deficiency in power occurring during the charging procedure of the high-voltage battery (6) in the high-voltage network (3) the power of at least one of the network components (9 - 11) connected in the at least one low-voltage network and the power quantity of at least one of the at least one network components (6 - 8), submitted by the high-voltage network (3) to the at least one low-voltage network (4), is reduced,
    characterised in that
    to each network (3, 4) is assigned a control device (13, 14) for controlling the network components (6 - 11) and for determining the actual power consumption of the network (3, 4), wherein the control device (13) of the high-voltage network (3) in the case of a deficiency in power occurring during the charging procedure of the high-voltage battery (6) in the high-voltage network (3) submits an item of information regarding the deficiency in power in the high-voltage network (3) to the control device (14) of the at least one low-voltage network (4), wherein the control device (14) of the at least one low-voltage network (4) taking additionally into consideration at least one marginal condition concerning the power consumption of at least one network component (9 - 11) of the low-voltage network (4) reduces the power of at least one network component (9 - 11) of the low-voltage network (4).
  2. Method according to claim 1,
    characterised in
    that as marginal condition priorities are used which are allocated to the respective network components (9 - 11) of the at least one low-voltage network (4) by the control device (14).
  3. Method according to claim 2,
    characterised in
    that the prioritisation takes place depending on a comfort restriction, resulting from the power reduction, of one or more vehicle occupants, wherein the network components (9 - 11) connected with the greatest comfort restriction are reduced in their power last.
  4. Method according to any of the preceding claims,
    characterised in
    that as marginal condition it is provided not to discharge at least one low-voltage battery (9) connected in the at least one low-voltage network (4).
  5. Method according to any of the preceding claims,
    characterised in
    that for power reduction in at least one low-voltage network (4) it is provided to limit the charging current of at least one low-voltage battery (9) connected in the at least one low-voltage network (4).
  6. Method according to any of the preceding claims,
    characterised in
    that the power quantity becoming available in the high-voltage network (3) by means of the reduction of the power quantity submitted to the at least one low-voltage network (4) is supplied to at least one cooling device assigned to at least one high-voltage battery (6), connected as network component (7, 8) in the high-voltage network (3).
  7. Motor vehicle, including an onboard power supply (1), a DC/DC converter (5), a charging device (12) and two control devices (13, 14) connected with one another via a communication connection (15), wherein the onboard power supply (1) has at least two electrical networks (3, 4) having different network voltages, wherein by means of a high-voltage network (3) for supplying with power at least one low-voltage network (4), a specified power quantity submits via the DC/DC converter (5) to the at least one low voltage network (4), wherein to each network (3, 4) is connected at least one network component (6 - 11), in particular an electrical load, and the high-voltage network (3) has at least one high-voltage battery (6) connected thereto,
    wherein
    the motor vehicle (2) is configured in the case of a deficiency in power occurring during the charging procedure of the high-voltage battery (6) in the high-voltage network to reduce the power of at least one of the network components (9 - 11) connected in the at least one low-voltage network (4) and the power quantity of at least one of the at least one network components (6 - 8) submitted by the high-voltage network (3) to the at least one low-voltage network (4),
    characterised in that
    to each network (3, 4) is assigned one of the control devices (13, 14) for controlling the at least one network component (6 - 11) and for determining the actual power consumption of the network (3, 4), wherein the control device (13) of the high-voltage network (3) is designed to control the operation and therewith the power consumption of the network components (6 - 8) connected on the high-voltage network side and to determine the actual power consumption of the high-voltage network (3) and wherein the control device (14) of the at least one low-voltage network (4) is designed to control the operation and therewith the power consumption of the network components (9 -11) connected on the low-voltage network side, wherein the control device (13) of the high-voltage network (3) is furthermore configured in the case of a deficiency in power occurring during a charging procedure of the high-voltage battery (6) via the charging device (12) in the high-voltage network (3) to submit an item of information concerning the power deficiency in the high-voltage network (3) via the communication connection (15) to the control device (14) of the at least one low-voltage network (4), wherein the control device (14) of the at least one low-voltage network (4) is furthermore configured, taking into additional consideration at least one marginal condition concerning the power consumption of at least one of the network components (9 - 11) of the at least one low-voltage network (4) to reduce the power of at least one of the network components (9 - 11) of the at least one low-voltage network (4).
EP11801984.3A 2011-01-12 2011-12-16 Method for operating an onboard power supply system of a motor vehicle Active EP2663468B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011008376A DE102011008376A1 (en) 2011-01-12 2011-01-12 Method for operating an onboard network structure of a motor vehicle
PCT/EP2011/006368 WO2012095145A2 (en) 2011-01-12 2011-12-16 Method for operating an onboard power supply system of a motor vehicle

Publications (2)

Publication Number Publication Date
EP2663468A2 EP2663468A2 (en) 2013-11-20
EP2663468B1 true EP2663468B1 (en) 2020-03-18

Family

ID=45418609

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11801984.3A Active EP2663468B1 (en) 2011-01-12 2011-12-16 Method for operating an onboard power supply system of a motor vehicle

Country Status (5)

Country Link
US (1) US9493128B2 (en)
EP (1) EP2663468B1 (en)
CN (1) CN103313872B (en)
DE (1) DE102011008376A1 (en)
WO (1) WO2012095145A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2996374B1 (en) * 2012-10-03 2016-10-28 Valeo Systemes De Controle Moteur ELECTRICAL NETWORK FOR MOTOR VEHICLE
DE102012219077A1 (en) * 2012-10-08 2014-04-10 Siemens Aktiengesellschaft Method for distributing an electric power
US9981578B2 (en) * 2013-02-22 2018-05-29 Kongsberg Automotive Ab Vehicle assembly and method of allocating power in the same
CN105228851B (en) * 2013-05-22 2017-05-24 三菱电机株式会社 Vehicle power supply system
DE102018204968A1 (en) * 2018-04-03 2019-10-10 Robert Bosch Gmbh Method and device for operating a motor vehicle
FR3117418A1 (en) * 2020-12-16 2022-06-17 Psa Automobiles Sa MANAGEMENT OF THE ELECTRICAL ENERGY CONSUMED IN A VEHICLE IN THE EVENT OF DETECTION OF DECOUPLING OF A RECHARGEABLE BATTERY

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005002401A1 (en) * 2005-01-19 2006-08-03 Hella Kgaa Hueck & Co. Arrangement and method for regulating power in a motor vehicle electrical system
WO2007096720A1 (en) * 2006-02-24 2007-08-30 Toyota Jidosha Kabushiki Kaisha Electrically driven vehicle
DE60033861T2 (en) * 1999-09-22 2007-11-15 Peugeot Citroen Automobiles S.A. System for managing the electrical energy of a hybrid vehicle
DE102008010097A1 (en) * 2008-02-20 2009-08-27 Wilhelm Karmann Gmbh Electrical energy storage arrangement for use in electric vehicle for providing energy to e.g. consumer, has energy storages e.g. batteries, spatially associated to consumers and selectively switched on at charging device by supply line
EP2255990A1 (en) * 2008-03-17 2010-12-01 Toyota Jidosha Kabushiki Kaisha Electric vehicle

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19534174A1 (en) 1995-09-14 1997-03-20 Linde Ag Electric vehicle electric motor power battery charging method
JP4085334B2 (en) * 2004-11-09 2008-05-14 株式会社デンソー Dual power supply type vehicle power supply
US7304461B2 (en) * 2004-11-18 2007-12-04 Honda Motor Co., Ltd. DC/DC converter
DE102005026866A1 (en) * 2005-06-10 2006-12-14 GM Global Technology Operations, Inc., Detroit Battery charging monitoring method e.g. for motor vehicle, involves measuring brief battery voltage drop when starting of engine of motor vehicle with lowest voltage level recorded and transmitted to controller
JP4589872B2 (en) * 2006-01-04 2010-12-01 本田技研工業株式会社 Control device for electric vehicle
JP2007311065A (en) * 2006-05-16 2007-11-29 Toyota Motor Corp Battery device, vehicle mounting this, and abnormality determining method of battery device
DE102006026404A1 (en) 2006-06-07 2007-12-13 Robert Bosch Gmbh Energy coordinator for an electrical network
JP2010195065A (en) * 2009-02-23 2010-09-09 Nissan Motor Co Ltd Control device and method for vehicle using photovoltaic power generation
JP2010213556A (en) * 2009-03-12 2010-09-24 Omron Corp Charging apparatus, and information presentation method
JP5292186B2 (en) 2009-05-28 2013-09-18 トヨタ自動車株式会社 Electric vehicle power supply system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60033861T2 (en) * 1999-09-22 2007-11-15 Peugeot Citroen Automobiles S.A. System for managing the electrical energy of a hybrid vehicle
DE102005002401A1 (en) * 2005-01-19 2006-08-03 Hella Kgaa Hueck & Co. Arrangement and method for regulating power in a motor vehicle electrical system
WO2007096720A1 (en) * 2006-02-24 2007-08-30 Toyota Jidosha Kabushiki Kaisha Electrically driven vehicle
DE102008010097A1 (en) * 2008-02-20 2009-08-27 Wilhelm Karmann Gmbh Electrical energy storage arrangement for use in electric vehicle for providing energy to e.g. consumer, has energy storages e.g. batteries, spatially associated to consumers and selectively switched on at charging device by supply line
EP2255990A1 (en) * 2008-03-17 2010-12-01 Toyota Jidosha Kabushiki Kaisha Electric vehicle

Also Published As

Publication number Publication date
US20140346858A1 (en) 2014-11-27
WO2012095145A2 (en) 2012-07-19
CN103313872A (en) 2013-09-18
DE102011008376A1 (en) 2012-07-12
WO2012095145A3 (en) 2013-06-20
EP2663468A2 (en) 2013-11-20
US9493128B2 (en) 2016-11-15
CN103313872B (en) 2016-09-28

Similar Documents

Publication Publication Date Title
EP2663468B1 (en) Method for operating an onboard power supply system of a motor vehicle
DE102011011800B4 (en) Method for power supply for a vehicle and corresponding device and vehicle
DE102013200763A1 (en) SYSTEM AND METHOD FOR VEHICLE ENERGY MANAGEMENT
DE102013200133A1 (en) Electric vehicle
DE102012201897A1 (en) Electric vehicle and method for controlling auxiliary active battery exhaustion
DE102012222102A1 (en) ACTIVE CONTROL SYSTEM FOR A LOW VOLTAGE DC VOLTAGE TRANSFORMER IN AN ELECTRIC VEHICLE
DE102010046616A1 (en) System and method for supplying electrically powered consumers and motor vehicles
DE112010005421T5 (en) Battery power management system
DE102014006028A1 (en) Multi-battery system for increasing the electrical range
EP3634803B1 (en) Power supply for a rail vehicle
WO2015135729A1 (en) Arrangement for supplying electrical energy to a motor vehicle
DE112012007029T5 (en) Power supply handling system and power supply handling method
DE102013225097A1 (en) Energy management method for operating an electrical system of a motor vehicle and motor vehicle
DE102012008687A1 (en) Car with a high-voltage power supply system
DE102014203931A1 (en) Method for performing a third-party startup or a third-party charging of vehicles
EP2877366A2 (en) Electrical circuit arrangement for an electrically driven vehicle, vehicle and corresponding method
DE102016220557A1 (en) Battery assembly, operating method for a battery assembly and vehicle
DE102017206497B4 (en) Charging device and method for charging an electrical energy store of a vehicle, and motor vehicle
DE102015003231A1 (en) Method for supplying power to a vehicle electrical system of a motor vehicle
DE102011107229B4 (en) Heating system for a vehicle and vehicle with a heating system
DE102014224922A1 (en) Rail vehicle with electrical system, on-board battery and battery charger, and method for operating the rail vehicle
DE102014209267A1 (en) Heating device and method for reducing an overvoltage in a vehicle electrical system of a means of transportation
DE102013205221A1 (en) Method and device for operating a DC / DC down converter for the electrical control of a hybrid motor vehicle
DE102012209453A1 (en) Motor vehicle electrical system with an electric machine and at least two energy storage devices with different charging voltages and method for operating the same
DE102012101586A1 (en) Vehicle device for supplying electric power and system for supplying electric power

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

17P Request for examination filed

Effective date: 20131220

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20180425

REG Reference to a national code

Ref country code: DE

Ref legal event code: R079

Ref document number: 502011016559

Country of ref document: DE

Free format text: PREVIOUS MAIN CLASS: B60L0011180000

Ipc: B60L0053000000

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

RIC1 Information provided on ipc code assigned before grant

Ipc: B60L 1/02 20060101ALI20191008BHEP

Ipc: B60L 58/20 20190101ALI20191008BHEP

Ipc: B60L 53/00 20190101AFI20191008BHEP

INTG Intention to grant announced

Effective date: 20191107

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502011016559

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1245531

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200415

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200618

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20200318

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200619

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200618

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200718

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200812

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502011016559

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

26N No opposition filed

Effective date: 20201221

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20201231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201216

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201216

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201231

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201231

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 1245531

Country of ref document: AT

Kind code of ref document: T

Effective date: 20201216

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201216

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201231

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230530

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20231218

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20231220

Year of fee payment: 13

Ref country code: DE

Payment date: 20231231

Year of fee payment: 13